. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. g. Bidens bipinnata L. Spanish Fig. 4513. Bidens bipinnata L. Sp. PI. 832. 1753. Annual; stem quadrangular, erect, freely branch-ed, rather slender, i°-5° high. Leaves thin, acumi-nate, petioled, 1-3-pinnately dissected into ovate oroblong, toothed or lobed segments, the lower often8 long; heads usually numerous, long-peduncled,2-4 broad; involucre narrow, i
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. g. Bidens bipinnata L. Spanish Fig. 4513. Bidens bipinnata L. Sp. PI. 832. 1753. Annual; stem quadrangular, erect, freely branch-ed, rather slender, i°-5° high. Leaves thin, acumi-nate, petioled, 1-3-pinnately dissected into ovate oroblong, toothed or lobed segments, the lower often8 long; heads usually numerous, long-peduncled,2-4 broad; involucre narrow, its outer bractslinear, ascending, nearly as long as the broader erectinner ones; rays 3-4, yellow, short, sometimes none;achenes linear, 4-angled, slightly pubescent, narrowedupward into a beak. 5-9 long, the outer ones com-monly shorter and thicker than the inner; pappusof 2-4 (usually 4), downwardly barbed, slightly un-equal, spreading awns, much shorter than the achene. In various situations, often a weed in cultivated fields,Rhode Island to Florida, Ohio, Nebraska, Kansas andArizona. Introduced as a weed into southern Europeand Asia. 10. Bidens coronata (L.) Fisch. SouthernTickseed-Sunflower. Fig. 4514. Coreopsis coronata L. Sp. PL Ed. 2, 1281. 1763. Coreopsis aurea Ait. Hort. Kew. 3: 252. 1789. Bidens coronata Fisch.; Steudel, Nom. Ed. 2, 202. 1840. Annual, glabrous or nearly so throughout; stembranched, i°-3° high. Lower leaves petioled, sslong, 3-divided, the terminal segment lanceolate, acuteor acuminate, serrate, much larger than the serrateor entire lateral ones; upper leaves much smaller,3-parted, 3-lobed or undivided, sessile or short-petioled, entire or serrate; leaves rarely all undi-vided ; heads numerous, slender-peduncled, i-2broad; involucre hemispheric, its outer bracts linear-oblong, obtuse, equalling or slightly exceeding thebroader inner ones; rays 6-10, obtuse; achenesbroadly cuneate, slightly pubescent, i-2 long; pap-pus of 2 chaffy blunt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
